Crusher.



' No. 741,453. PATENTED OCT. 13,1903 W. W. CASE. I I

' GRUSHER.

APPLIUATION FILED JUNE 19, 1903.

' N0 MODEL.

UNITED STATES WILLIS I W. CASE, OF

\ Patented October 13, 1903'.

1 ENvnR, ooLoRADo.

QRUSHE-R.

SPECIFICATION forming part Of Letters Patent N 0. 741,458, dated October 13, 1903.

Application filed June 19, 1903'.

.TdaZZ whom it may concern.-

Be it known that I, WILLIs W. CASE, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Crushers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in crushers, and especially to that class used in assay-laboratories and which may be run by hand, if necessary.

The object of my invention is to produce a strong and cheap laboratory crusher, and more especially one that may be easily taken apart and cleaned and reassembled. In making assays it is of course of the highest importance that the work should be accurately done and that the sample being crushed should not be contaminated or salted by the ore previously crushed, as this would destroy the accuracy of the assay and render it worthless.

With these objects in view my invention consists in the construction and combinations of parts, as hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a longitudinal vertical section ofmy invention. Fig. 2 is an end view of the casing, showing the means for holding in position the stationary jaw-plate, which jaw-plate, however, is readily removable from the crusher. Fig. 3 is a View of the means for securing the lower end of the movable jaw in its socket. Fig. 4: is a view of one of the removable adjusting-shims, and Fig. 5 is an edge view of the same. v

a represents the frame carrying the jaws. This frame is of the peculiar form shown in Fig. 1 and terminates in the lower extended portion'b, which is provided with bolt-holes to secure the same to a bench or support.

7 The left-hand side of this frame, as shown in Fig. 1, terminates in a portion 0, against which the stationary j aw-plate rests. The portion a is provided with a vertical slot 01, within which the bolt e is adapted to slide for the purpose of easily and quickly removing the jaw-plate f. This bolt e passes through the j aw-plate f and is firmly screwed into the same, the inner end thereof being upset or riveted, so that Serial No. 162,261. (No model.)

the jaw-plate f shall have a flat face. Any other means for securing these parts together may be used, if desired. The bolt 6 passes through a washer g and is provided with a threaded hand-wheel h for firmly securing the jaw-plate f to the part c of the main frame.

j represents removable shims, which are slotted, as shown at k in Fig. 4. These shims are ada'pted'to he slipped down between the jaw-plate f and the portion 0 of the frame in order tovary the degree of fineness to which the material is to be crushed.

It often happens that when hard ore is to be crushed it is best to run it through the crusher coarse the firsttime andthen put in additional shims and crush it finer afterward.

Any desired vnumber of these shims may be used, though only two are shown in Fig. 1.

The shims j are at their upper end bent over, as shown at Z, for two reasons-first, to afford a handle whereby to remove them, and also for the furtherpurpose of preventing any particles of .ore'or rock from falling down into the slot d, thereby clogging the same.

Experience has shown that laboratory attendants will not take apart a crusher and thoroughly clean it unless this can be very readily and easily done. It is of thehighest importance, therefore, that the crusher be so arranged that no trouble will be experienced in taking it apart for the purpose of cleaning. Should particles of rock lodge in the slot d, it would be difficult to remove the jaw-plate and in many instances the attendant would fail to clean the crusher.

' m represents the movable j aw provided with a long heel, which terminates in the rounded portion n, which portion fits in a socket in the frame a. The lower part of this heel is cut away, as shown at 0, Fig. 3, to permit the use of the latch 19, which holds the lower end of the movable jaw in position. The jaw is held in position by said latch, the lower part of which is weighted, as shown at q, and which is mounted on a pin 1, passing through a. hole in the frame a and held in position by the cotter-pin s. It will be obvious that by turning the latch 19 to a horizontal position the -movable jaw we may be disengaged from the frame to permit of cleaning.

15 represents the driving-shaft provided with afly-wheel a, which shaft may either be driven by hand or power. This shaft has an eccentric portion 1', 011 which is sleeved a pitman c,

which terminates in the rounded extension 3 and is provided with an opening .2. The extension 1 fits in a socket in the movable j aw m.

1 represents a spring-plate which is attached to a projection 2 on the movable jaw by means of the screw 3. This spring-plate passes into the opening .2 and holds the movable jaw m in contact with the projection y of the pitman at.

It should be noted that the driving -shaft and the eccentric are located above the point where the pitman joins with the movable jaw m and that said movable jaw is provided with a long heel. These are especially important features of construction. By locating the cocentric and driving-shaft in this position the force exerted on said jaw is practically in line with the greatest resistance, as by reason of the long heel an upward and downward grinding movement is exerted, as well as a motion toward the jaw f. Applying the power at this point makes the crusher run more smoothly and easily.

\Vhile I have thus described my invention, I wish it to be distinctly understood that I do not limit myself to the exact details shown and described, as many changes might be made by those skilled in the art without departing from the spirit of my invention. For instance, an eccentric might be used for securing the stationary jaw-plate f in position and the-means for holding the latch 13 and the form of the latch itself might be varied. Furthermore, the means for holding the pitman in engagement with the upper end of the movable jaw might also be varied.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a crusher, the combination of a frame provided with a slot, a removable jaw-plate, a bolt secured thereto and adapted to pass through said slot, a washer and threaded hand-wheel for securing said bolt and jawplate in position in the machine, and a removable shim provided with a slot and having one of its ends curved over, substantially as described.

2. In a crusher, the combination of a movable jaw, a pitman for operating said jaw, and a spring-plate fastened to said jaw and in engagement with said pitman, substantially as described.

3. In a crusher, the combination of a movable jaw, a driving-shaft provided with an eccentric portion, a pitman connecting said shaft and said jaw and a spring-plate fastened to said jaw and in engagement with said pitman, said shaft being located above said jaw, whereby a downward as well as a forward thrust is given to said jaw by the movement of the pitman, substantially as described.

4. In a crusher, the combination. of a movable jaw, provided with a rounded portion at one end, a frame provided with a socket re ceiving said rounded portion, and a swinging latch adapted to hold said jaw against said frame, substantially as described.

5. In a crusher, the combination of a frame provided with a socket, a movablej awprovided with a long heel terminating in a rounded portion adapted to engage said socket, and a weighted pivoted latch to hold said jaw against said frame, substantially as described.

6. In a crusher, the combination of a shaft provided with an eccentric portion, a pitman having a rounded end, a movable jaw provided with a socket in which the rounded end of said pitman is adapted to bear and with a long heel terminating in a rounded portion, a spring-plate holding said jaw and said pitman against eaeh other, a supporting-frame provided with asocket with which the round ed portion of said movable jaw is adapted to engage, and a weighted pivoted latch for holding said rounded portion in said socket, said shaft being located above said jaw, substantially as described.

7. In a crusher, the combination of a frame provided with a slot and with a socket, a removable j aw-plate provided with a bolt adapted to engage said slot, a washer and threaded hand-wheel on said bolt, a slotted shim having its upper end curved over, a driving-shaft located above the movable jaw and provided with an eccentric portion, a perforated pitman mounted on said eccentric portion and terminating in a rounded end, a movable jaw provided with a socket adapted to receive the rounded end of said pitman and also provided with a long heel terminating. in a rounded portion, a spring-plate fastened to said movable jaw and entering an opening in said pitman, and a weighted pivoted latch secured to said frame and adapted to hold the lower end of said movable jaw in the socket in the frame, substantially as'described.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIS "W. CASE.

Witnesses:

FRANK 1). BLAcKIs'roNE, FRED W. ENGLER'L. 

